Why does lshw command on ubuntu shows me ram information different from what I see on my ram when opening my laptop?

Question

When using lshw command to verify my ram info it shows that i have:

SODIMM DDR3 Synchronous Unbuffered (Unregistered) 800 MHz (1.2ns)

But when i open my laptop I see that i have:

2GB 1R×16 PC3L-12800S-11-13-C3

I am using Ubuntu 20.04 The ram vendor is Samsung

When googling i found that ddr3 is the same as pc3 and ddr3l is like pc3

The other slot contains hynix ram stick which shows me also the same thing (DDR3)

I hope the screenshots are visible

The laptop is lenovo G50-45

Edit your question and show me `free -h` and `sudo lshw -C memory`. Start comments to me with @heynnema or I'll miss them. — heynnema, Jul 25 '20 at 20:43
It shows that you have 4G RAM total. That's two 2G SODIMMs. What part doesn't look correct to you? — heynnema, Jul 25 '20 at 22:25
@heynnema i just added a picture of the ram..As you can see the ram is PC3L..that is the part I don't really understand — Guy Cherubin, Jul 25 '20 at 22:29
DDR3 or PC3 is the Standard Voltage memory module that operates at 1.50V (JEDEC compliant). DDR3L or PC3L is the Low Voltage memory module that operates at 1.35V (JEDEC compliant). — heynnema, Jul 25 '20 at 22:33
See https://www.crucial.com/compatible-upgrade-for/lenovo/lenovo-g50-45 — heynnema, Jul 25 '20 at 22:35
@heynnema But why does it shows me different ram information? Or do i have a ddr3 ram or ddr3l ram? Because on the picture of the ram stick, it is a ddr3l but the command tells me that i have a ddr3 — Guy Cherubin, Jul 25 '20 at 22:37
They look the same to `lshw`. The only difference, in most cases, is the operational voltage. Technically your computer uses the L variant. — heynnema, Jul 25 '20 at 22:41
@heynnema Thank you...i think so because the dmidecode -t memory command shows me also that it is a ddr3 — Guy Cherubin, Jul 25 '20 at 22:47

heynnema · Accepted Answer · 2020-07-25T22:51:26.893

Lenovo G50-45

DDR3 or PC3 is the Standard Voltage memory module that operates at 1.50V (JEDEC compliant).

DDR3L or PC3L is the Low Voltage memory module that operates at 1.35V (JEDEC compliant).

These look the same to lshw. The only difference, in most cases, is the operational voltage.

sudo lshw -C memory shows that you have 4G RAM total. That's two 2G DDR3L or PC3L SODIMMs.

Technically your computer uses the L variant.

1 Answers1